Monday, September 19, 2011

Chapter 2: 2.1 Reasoning and Proof

There will be 3 videos for todays lesson. Watch each video in class then complete the homework in your workbook.

     Assignment: Start in class and finish for HW. Do from workbook pg 9-10 #’s 1-4, 5-11 odd, and 15, 18, 23

Example 1




Example 2



Example 3






2.1 Use Inductive Reasoning

Geometry, like much of science and mathematics, was developed partly as a result of people recognizing and describing patterns. In this lesson, you will discover patterns yourself and use them to make predictions.

Goal: How do you use inductive reasoning in mathematics?

Vocabulary

INDUCTIVE REASONING

Inductive Reasoning-you use when you find a pattern in specific cases and then write a conjecture for the general case.

Conjecture
- is an unproven statement that is based on observations.


DISPROVING CONJECTURES
To show that a conjecture is true, you must show that is is true of all cases. You can show that a conjecture is false, however, by simply finding counterexamples.

Counterexample- is a specific case for which the conjecture is false.

In class examples: Chapter 2, lessons 1: Examples 5-6